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(11)

EP 3 746 535 A1

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(43) Date of publication: 09.12.2020 Bulletin 2020/50 (21) Application number: 19704910.9 (22) Date of filing: 17.01.2019

(51) International Patent Classification (IPC):  C11D 3/33(2006.01) D21C 9/00(2006.01) D06M 13/342(2006.01) D21H 17/00(2006.01) C02F 5/10(2006.01) D21C 9/08(2006.01) D21H 17/07(2006.01) (86) International application number: PCT/US2019/013972 (87) International publication number: WO 2019/152208 (08.08.2019 Gazette 2019/32)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 30.01.2018 US 201862623692 P (71) Applicant: Eastman Chemical Company Kingsport, TN 37660 (US)

(72) Inventors: DOUGHERTY, Shawn, Marie Kingsport, TN 37660 (US) XU, Rong Johnson City, TN 37601 (US) CLAUSON, Jeffrey, Michael Kingsport, TN 37660 (US) ABOLINS, Brendan, Patrick Johnson City, TN 37604 (US) FLINT, Kenneth Roanoke, VA 24018 (US) IZALLALEN, Mounir Kingsport, TN 37664 (US) MARTYAK, Nicholas, M. Johnson City, TN 37615 (US) THAYER, Ryan, M. Kingsport, TN 37660 (US) (74) Representative: Ricker, Mathias  Wallinger Ricker Schlotter Tostmann Patent- und Rechtsanwälte Partnerschaft mbB Zweibrückenstrasse 5-7 80331 München 80331 München (DE)